I like how the wings are connected. There's some inter-connected movement?

I'm not sure what you're asking. The wings are articulated, and the 'bones' of the wings can move up and down, and the top two sections move together. You can't see it here, but the legs have a mechanism which makes it so there is no gap in the knee when the leg is bent. Those are the only two sections that I can think of that would fit your question.

I like your MOC, but I'm curious about something. How tall is it compared to an average sized BIONICLE figure?